Electronic control device for autonomous driving of a vehicle
There is achieved an electronic control device capable of calculating an optimal travel plan even during dynamic reconfiguration of a calculation circuit configuration. When a driving state changes, a travel plan parameter generation/selection unit divides evaluation calculation units into two blocks and performs reconfiguration of the respective evaluation calculation units a plurality of times via a reconfiguration control unit. While the evaluation calculation units are reconfigured, the evaluation calculation units performs evaluation calculation, and while the evaluation calculation units are reconfigured, the evaluation calculation units perform evaluation calculation. Thus, even while some of the evaluation calculation units are being reconfigured, it is possible to continue evaluation of the travel plan in the rest of the evaluation calculation units.
1. An electronic control device comprising:
a controller which outputs one of a plurality of travel plan parameters and a reconfiguration instruction;
a memory which stores data; and
a reconfigurable circuit which includes a plurality of evaluation calculation units for performing travel evaluation calculation by using the plurality of travel plan parameters,
wherein, when the reconfiguration instruction is output from the controller, the reconfigurable circuit
divides the plurality of evaluation calculation units into a plurality of blocks, for divisional performance of reconfiguration processing by a number of divisions,
starts the reconfiguration processing of a portion of the plurality of blocks, during the reconfiguration processing a remainder of the plurality of blocks, that are not undergoing the reconfiguration processing, evaluate the plurality of travel plan parameters, and
upon completion of the reconfiguration processing, receives a signal from the controller to deactivate the reconfiguration instruction and send to the controller the one of the plurality of travel plan parameters based on the evaluation; and
wherein the electronic control device is a vehicle control device used to autonomously drive a vehicle.
2. The electronic control device according to claim 1 , wherein
the reconfigurable circuit supplies identical circuit data to the plurality of evaluation calculation units.
3. The electronic control device according to claim 2 , wherein
the memory stores the circuit data and the reconfigurable circuit supplies circuit data read from the memory to the plurality of evaluation calculation units.
4. The electronic control device according to claim 2 , wherein
the circuit data is transmitted from the controller to the reconfigurable circuit.
5. The electronic control device according to claim 1 , wherein
the plurality of evaluation calculation units are divided into evaluation calculation units performing reconfiguration within a same period and evaluation calculation units performing reconfiguration within another period, and the controller outputs one of the plurality of travel plan parameters only to the evaluation calculation units that does not perform reconfiguration.
6. The electronic control device according to claim 1 , further comprising
a driving state control unit which determines a driving state,
wherein the controller outputs the reconfiguration instruction on the basis of a driving state determined by the driving state control unit.
7. The electronic control device according to claim 6 , wherein
the number of divisions is two.
8. The electronic control device according to claim 5 , wherein
the controller determines evaluation calculation units for which reconfiguration has completed within the same period or within the other period to output one of the plurality of travel plan parameters to the evaluation calculation units for which reconfiguration has completed.
9. The electronic control device according to claim 6 , wherein
the driving state control unit is disposed inside the controller.